Here's a couple of things to do while your here:
Museums + indoor culture day (great for colder weather): Detroit Institute of Arts area, Midtown galleries, live theater/comedy.
Food and neighborhood crawl: Corktown, Midtown, Eastern Market district—build it around coffee + lunch + dessert.
Sports night: catch an NHL/NBA game (season is in full swing) or a concert downtown.
Riverfront walk (bundle up): short sunset stroll + warm drink nearby.
Day trip vibe (30–45 minutes out): cider mills, late-season fall colors, and small-town main streets.